 <form nz-form [formGroup]="validateForm" (ngSubmit)="_submitForm()">
     <div nz-form-item>
        <div nz-form-control>
          <nz-input formControlName="account" [nzPlaceHolder]="'Account'" [nzSize]="'large'" [(ngModel)]="user.account">
            <ng-template #prefix>
              <i class="anticon anticon-user"></i>
            </ng-template>
          </nz-input>
          <div nz-form-explain *ngIf="validateForm.controls.account.dirty&&validateForm.controls.account.hasError('required')">请输入账号!</div>
        </div>
      </div>

      
    </form>
